WTA: Victoria Azarenka on facing Serena Williams Two-time Grand Slam winner Victoria Azarenka explains how her rivalry with Serena Williams pushes her to become a better player.SI Staff|Share on FacebookShare on XAdd us on Two-time Grand Slam winner Victoria Azarenka explains how her rivalry with Serena Williams pushes her to become a better player.Published Aug 31, 2015 | Modified Aug 31, 2015SI STAFFShare on FacebookShare on XHome/Tennis